Special Containment Procedures: SCP-XXX must be kept in a vacuumed bell jar, which is to be kept in a locked container.

Description: SCP-XXX is a 24V DC red fire alarm. It is in good condition, with some minor scratching on its face. It was discovered in ████████, Dorsetshire in the UK in the ██████ ███ ███████ accounting firm following an investigation after the receptionist and security guard were admitted at separate times to hospital on the night of the 25th of August 20██ with third degree burns over large portions of their body. The security guard was pronounced dead upon arrival, but the receptionist was in a stable yet critical condition. She regained consciousness briefly, and was able to conduct an interview with Dr ████, a Foundation plant at the hospital. This interview led the Foundation to search the accounting firm's lobby and take possession of SCP-XXX.

SCP-XXX will ring when it detects trace amounts of smoke from any source in the same room as it, including but not limited to, cigarettes, naked flames, and burning food. It will not ring if the source of the smoke is in a different room, even if there is no barrier such as a closed door or window between the two rooms. Similarly, SCP-XXX cannot be heard ringing if the listener is standing in a separate room. The method with which it detects smoke has yet to be discovered, as there is no smoke detector present on it. It can run seemingly without power, as there is neither a battery compartment nor any form of electrical wiring.

The effects of SCP-XXX become apparent to anyone who has heard it ring. Subjects who have listened to SCP-XXX have described it as being uncomfortably loud and that it makes them feel uneasy, with a compelling desire to extinguish all nearby sources of smoke. After the sources have been extinguished, SCP-XXX will cease ringing even if there is still smoke in the air. There is no other immediate effects. The secondary effects of SCP-XXX manifest themselves when the subject goes to sleep past 10pm on the same night. Subjects wake up with the room they were sleeping in filled with thick black smoke. A humanoid figure with dark skin and of indeterminate gender, henceforth referred to as SCP-XXX-1, is standing beside the subject's bed. SCP-XXX-1 will begin to assault the subject by grabbing, slapping or rubbing the subject with open palms. Third degree burns appear on the subjects body where they have been touched, and the burns are said to be incredibly painful. After seemingly random amount of time, SCP-XXX-1 will disappear and the room will clear of smoke instantly. The burns can then be treated normally by medical professionals.